Meeting Banner
Abstract #1587

Audiovisual Biofeedback Improves Image Quality and Reduces Scan Time for Gated 3D MRI

Danny Lee1, Peter Greer2, Jameen Arm3, Paul Keall1, Taeho Kim1

1Radiation Physics Laboratory, Sydney Medical School, The University of Sydney, Camperdown, NSW, Australia; 2The University of Newcastle, Newcastle, NSW, Australia; 3Calvary Mater Newcastle Hospital, Newcastle, NSW, Australia

Audiovisual (AV) biofeedback system has been employed to provide respiratory guidance during MR scans. The respiratory motion signals were obtained using real-time position management system to monitor a marker block on the abdomen. Respiratory-related motion artifacts have been noticeably reduced between breathing types (free and AV biofeedback) and scan time has been reduced for gated 3D MRI. Consequently, the improvement was from respiratory motion reproducibility, leading to regular internal organ displacement during gated 3D MR imaging. This study was the first to demonstrate that audiovisual biofeedback improves image quality and reduces scan time for gated 3D MRI.

Abstract PDF Poster PDF

Keywords

abdomen abdominal acceptance acquisition addition amplitude application artifacts assess audiovisual bellows belt biofeedback block blurred blurring breathing calvary camera cause clear clearly combined coming considerably consisting contrast cycle detailed diaphragm displacement distortions dome edge efficiency employed error evaluated evolutions example except exhalation free gated gating ghost guidance healthy hospital human improve improved improvement improves inadequate included infrared inhalation internal intersection investigate investigated irregular laboratory leading lengthening lessened liver lobes lung management marker mater matrix medical middle moreover motion moving navigator near noticeably optimized organ organs perfection period peter phys physics position positions previously pulse qualitatively quality quantified radiation real reduced reduces reduction regular regularity related reproducibility respiratory root sampling scanner school scout selected separated session sessions sharpened significantly simultaneously space square subject subjects system table thoracic typical underwent variation variations window wood